[785] διέπρησσον πεδίοιο: for this local gen. see H. G. § 149; it ‘expresses a vague local relation (within, in the sphere of, etc.).’ ‘This use of the gen. is almost confined to set phrases; accordingly it is only found with the gen. in “-οιο” (the archaic form).’ Cf. 801, and 24.264 “ἵνα πρήσσωμεν ὁδοῖο”, and note on 1.483.